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How important is a border? And what's at stake when the scaffolding of peace is rearranged at its foundation?Today marks 20 years of the Good Friday agreement. That means two decades of peace in a region once plagued by attacks and violence. But the border between Northern Ireland and the Republic of Ireland is making headlines once again, as the European Union prepares for Brexit.

We're joined by Augustana University professors Patrick Hicks and Bill Swart.